Method for enabling high-brightness, narrow-band orbital radiation to be utilized simultaneously on a plurality of beam lines

Abstract

In an electron accelerator such as an electron storage ring, a linac or an energy-recovery linac, accelerated electron bunches are subjected to light-electron interaction to have a varying profile of electron density and the thus modulated electron bunches are passed between deflecting magnets or injected into an undulator to generate high-brightness, narrow-band orbital radiation, thereby enabling high-brightness, narrow-band orbital radiation to be utilized simultaneously on a plurality of beam lines.

1 . A method for enabling high-brightness, narrow-band orbital radiation to be utilized simultaneously on a plurality of beam lines in an electron storage ring, a linac or an energy-recovery linac, which comprises subjecting accelerated electron bunches to light-electron interaction to have a varying profile of electron density and passing the thus modulated electron bunches between deflecting magnets or injecting them into an undulator to generate high-brightness, narrow-band orbital radiation.  
   
   
       2 . The method according to  claim 1 , wherein in an electron storage ring, an accelerated electron beam from an injector is further accelerated in an accelerating cavity and, after being circulated and stored in the ring, the beam is introduced into an FEL resonator and the resulting electron bunches are modulated to have a varying profile of electron density, the interval of which is equal to the wavelength of light and the thus modulated electron bunches are passed between the deflecting magnets or injected into the undulator so that on account of the interference resulting from the modulation in electron density, enhanced synchrotron radiation or undulator radiation is generated at a wavelength equal to the oscillation wavelength of the free-electron laser.  
   
   
       3 . The method according to  claim 1 , wherein in a linac or linear accelerator, an accelerated electron beam from the linac is introduced into an FEL resonator and the resulting electron bunches are modulated to have a varying profile of electron density, the interval of which is equal to the wavelength of light and the thus modulated electron bunches are passed between the deflecting magnets or injected into the undulator so that on account of the interference resulting from the modulation in electron density, enhanced synchrotron radiation or undulator radiation is generated at a wavelength equal to the oscillation wavelength of the free-electron laser.  
   
   
       4 . The method according to  claim 1 , wherein in an energy-recovery linac or linear accelerator which recycles the RF energy of a returned electron beam to accelerate ensuing electron bunches, an accelerated electron beam from an injector is further accelerated in a main accelerator, then introduced into an FEL resonator and the resulting electron bunches are modulated to have a varying profile of electron density, the interval of which is equal to the wavelength of light and the thus modulated electron bunches are passed between the deflecting magnets or injected into the undulator so that on account of the interference resulting from the modulation in electron density, enhanced synchrotron radiation or undulator radiation is generated at a wavelength equal to the oscillation wavelength of the free-electron laser.